Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

For More Weather Information:

New York, NY Local Forecast Office

5NM SSE Islip NY

Marine Point Forecast

[NOTICE]

Wednesday
SE 10kt
1ft
Wednesday Night
SSE 9kt
1ft
Thursday
S 21kt
2ft
Thursday Night
SW 19kt⇓
2ft
Juneteenth
WSW 15kt
1ft
Friday Night
WNW 12kt
1ft
Saturday
W 16kt
1ft
Saturday Night
WNW 13kt
1ft
Sunday
W 13kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 3:07 pm EDT Jun 16, 2026
Forecast Valid: 2am EDT Jun 17, 2026-6pm EDT Jun 23, 2026

View Nearby Observations

Detailed Forecast

Wednesday

S wind 5 to 10 kt becoming SE in the afternoon. Mostly cloudy, then gradually becoming sunny. Seas around 1 ft.

Wednesday Night

SSE wind around 9 kt. Increasing clouds. Seas around 1 ft.

Thursday

S wind 16 to 21 kt, with gusts as high as 31 kt. A chance of showers, mainly after 2pm. Seas around 2 ft.

Thursday Night

SW wind 16 to 19 kt becoming W 12 to 15 kt after midnight. Winds could gust as high as 26 kt. A chance of showers before 8pm. Seas around 2 ft.

Juneteenth

WSW wind 11 to 15 kt, with gusts as high as 21 kt. A slight chance of showers before 2pm. Seas around 1 ft.

Friday Night

WNW wind around 12 kt. Mostly clear. Seas around 1 ft.

Saturday

W wind around 16 kt, with gusts as high as 22 kt. Sunny. Seas around 1 ft.

Saturday Night

WNW wind 11 to 13 kt. Mostly clear. Seas around 1 ft.

Sunday

WNW wind around 13 kt becoming WSW in the afternoon. Sunny. Seas 1 ft or less.

Winds and waves may be higher in and near tstms.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.